Mosaic Screen Generation via DASH Metadata Signaling

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Solution Overview

Problem

Current Over The Top Video (OTT-V) systems, specifically Moving Picture Experts Group-Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (MPEG-DASH), do not effectively deliver useful information for generating a mosaic screen, making it difficult for clients to easily obtain a mosaic display of multiple video contents.

Innovation Solution

A transmitting and receiving system that delivers metadata including signaling information for thumbnail videos suitable for forming a mosaic screen, along with the minimum buffer time required before content playback, using attributes and attribute values, allowing clients to easily generate and display a mosaic screen.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If current DASH metadata is delivered without thumbnail video information, then the system maintains simplicity and compatibility, but the client cannot generate a mosaic screen effectively

Engineering Contradiction:

Improvemosaic screen generation capabilityVSAvoidthumbnail video information

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The server prepares and attaches thumbnail video information to the MPD metadata before delivery. This preliminary action ensures that when the client receives the metadata, the thumbnail information is already available for immediate use in generating the mosaic screen, eliminating the need for additional data requests or complex processing steps.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The MPD metadata structure is enhanced to serve multiple functions: it continues to provide standard DASH stream information while simultaneously carrying thumbnail video identification and buffer time attributes. This multi-functional approach allows the same metadata to enable both traditional adaptive streaming and mosaic screen generation without requiring separate data structures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If thumbnail video information and buffer time attributes are added to MPD, then mosaic screen generation becomes possible, but the metadata structure becomes more complex

Engineering Contradiction:

Improvemosaic screen adaptabilityVSAvoidmetadata structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Instead of fundamentally redesigning the entire MPD structure, the invention adds specific local elements (thumbnail_video_info and buffer_time attributes) at appropriate positions within the existing MPD hierarchy. This localized enhancement maintains the overall simplicity of the DASH metadata structure while introducing the necessary functionality for mosaic screen generation only where needed.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The invention uses standard DASH MPD metadata as an intermediary carrier to transmit thumbnail video information and buffer time attributes. By leveraging the existing MPD structure as a mediator, the system avoids creating entirely new data protocols or formats, thereby reducing implementation complexity while still achieving the desired adaptability for mosaic screen generation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the client receives detailed metadata with thumbnail information, then channel selection performance improves, but the data transmission volume increases

Engineering Contradiction:

Improvechannel selection performanceVSAvoidmetadata data volume

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The invention extracts only the essential information needed for mosaic screen generation (thumbnail video identification and minimum buffer time attributes) from the overall content metadata. By selectively including only these critical elements rather than all possible metadata fields, the system minimizes data transmission volume while maintaining sufficient information for effective channel selection and mosaic screen display.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The thumbnail video information and buffer time attributes are transmitted as lightweight, self-contained elements within the MPD structure. These elements are designed to be efficiently processed and discarded after use in mosaic screen generation, similar to disposable objects. This approach reduces the permanent data storage requirements and transmission overhead compared to maintaining complete video metadata for all content streams.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS10110972B2Transmitting device, transmitting method, receiving device, and receiving method

Publication Date: 2018.10.23 SATURN LICENSING LLC

AI summary

This technology relates to a transmitting device, a transmitting method, a receiving device, and a receiving method capable of easily obtaining a mosaic screen.Metadata described by using an attribute and an attribute value, the metadata of content including signaling information indicating that video is thumbnail video suitable for forming the mosaic screen and the attribute indicating minimum buffer time required before replay of the content starts is delivered. This technology may be applied when the content is delivered, for example.